Improvement in planing-machines



` 2Sheets-Sheet2. S. A. WOODS 8L W. H. GRAY.

Planing-Mahines.

No.l51,675. Parented1une2.1874,

UNITED STATES PATENT OEEIGE.

SOLOMON A. VOODS AND VILLIAM H. GRAY, OF BOSTON, MASSACHUSETTS,

. ASSIGNORS TO SOLOMON A. WOODS.

IMPROVEMENT l'N PLANlNG-MACHINES).

Specification forming part of Letters Patent No. 151,675, dated June 2,1874; application iiledv April 25, 187.4.

To all whom it may concern Be it known that w`e, SOLOMON A. WOODS andWILLIAM H. GRAY, both of Boston, in the county of Suolk and State ofMassachusetts, have invented certain Improvements in PlaningMachines;and we do hereby declare that the following, taken in connection withthe drawings which accompany and form part of this specification, is adescription of our invention suicient to enable those skilled in the artto practice it.

Our invention consists, primarily, in combining, with a shaving-guard orchip-breaker,y a presser-roll supported in bearings at each f end of thechip-breaker, the latter being arranged to raise and lower with theroll, and thus preserve a parallelism with the cutterbed, and being alsohung on two arms of equal length at each end of the chip-breaker, insuch a manner that the lower edge may be in near proximity to thecutting-cylinder, and free to move concentrically, or nearly so, to suchcylinder. It also consists in combining these features with anadjustable cutter-head frame.

In the drawings, Figure 1 is a plan, and Fig. 2 a verticalcross-section, of a planingmachine embodying our invention.

A is the adjustable cutter-head frame, arranged to be adjusted higher orlower, for planing different thicknesses of lumber, by means of theadjusting-screws l in the fixed standards or supports 2 2, on theinclined front face of which the frame is arranged to be slid orshifted. This frame supports all the operative parts of the mechanism,namely, the cutter-head B, the shaving-guard or chipbreaker C, theradial or concentric arms D D,

hung at d d on the frame, and connected to the chip-breaker fra-me at ld', the slotted lever arms or links E E, hung at c e, and connected toIche chip-breaker frame at e', the swing-bonnet F, hinged at e on therod G, the weighted arms H, projecting from the arms E, the presser-rollI, and the adjustable front roller-frame K and roller k. L represen ts apiece of lumber being plaued.

By means ofthe arms D D and the slotted lever arms or links E E, hung asshown, the lower edge of the chip-breaker is brought into closeproximity to the path of the cutter, and yet is free to move in an arcpractically concentric therewith, and at the same time preserve thegiven relative distance of the under surface of the chip-breaker orshaving-guard from the lumber, whether the cutter be reducing the lumberone-sixteenth or three-quarters of an inch, or more or less, while theroller, by means of the weights h h, presses on the surface of thelumber to liold it firmly to the bed while being acted upon by therotary cutter. The slotted lever-arms E E, to which the upper part ofthe chip-breaker frame is hung, also permit all the freedom of movementrequired for the chip-breaker, and aid the arms D D in such movements.

The swing bonnet or head F is of concave forni, and although arranged tobe swung back when desired, yet when the machine is working, it occupiesthe position shown in Fig. 2, forming, with the concave of thechipbreaker, a continuous gradual curved path for the chips, rcachin gup and over the top of the cutter, so as to convey them forward out ofthe way, and prevent their flying about or obstructing the operations ofthe cutting-cylinder.

IVheu the roll presses on the lumber, the under side of the guard orchip-breaker is near the lumber, but does not press upon it.

At each end of the presser-roll frame are inclined stop-pieces z' i,(which may, if desired, have a slight spring or yield,) to hold theframe from dropping too lovs7 when the board passes from under theroll.'y

The links, being attached to the cutter-head frame, are moved up anddown with it, when the latter is adjusted to plane lumber of differentthicknesses.

e claim- 1. The shavingguard or chip-breaker O, in combination with thepresser-roll I, hung on the parallel radial arms D D and E E, andoperating as shown and described.

2. The adjustable cutter-head frame A and the radial arms affixedthereto, in combination with the presser-roll and shavingguard orchip-breaker, as shown and described.

Executed this 23d day of April, A. D. 1874..

SOLOMON A. WOODS. WM. H. GRAY.

Witnesses M. W. FROTHINGHAM, C. WARREN BROWN.

